Gentian plant named ‘Ashiro 29-2075’

ABSTRACT

A new variety of Gentiana L. plant (Japanese gentian) which is a double flower type and has a diameter at the top of the corolla of 30.6 mm.

Common name: Japanese gentian.

Botanical classification: Gentiana L. hybrid.

Variety denomination: ‘Ashiro 29-2075’.

BACKGROUND OF THE NEW VARIETY

The present invention relates to a new and distinct variety of Japanesegentian, Gentiana L., which has been given the variety denomination‘Ashiro 29-2075’.

This new gentian is a double flower type and has a diameter at the topof the corolla of 30.6 mm. It is adapted for use as cut flowers or potflowers.

ORIGIN OF THE VARIETY

The variety resulted from a multiple-step cross-breeding programstarting from a group of unpatented varieties. The ancestor varietieswere unpatented strains owned by the applicant, having thecompany-internal names: ‘17INP’ which belongs to the species Gentianatriflora, and ‘25-322-R1’, ‘26-904’, ‘12-320-1’, ‘14-526-2’, ‘11-24-1’,‘11-192-1’, ‘13SH’, ‘10-76’, ‘6-62’, ‘12-186-1’, ‘12-212-1’, and‘25-817’, which belong to the species Gentiana scabra. Group crossesand/or self-crosses with a single individual were performed. The programhad seven steps, as shown in the map of FIG. 6 , which also indicatesthe company-internal names of the intermediary, unpatented strains. Ateach step, the individuals with good plant and flower shape wereselected. The corresponding species identification is (((scabra x(scabra x triflora)) x scabra))) x ((scabra x (scabra x triflora)).

The multiple-step cross-breeding program was performed over multiplegrowing seasons up to 2018; in October 2018, selection of the varietywas performed. We asexually reproduced the variety by vegetativereproduction through cuttings, tissue culturing via lateral bud culture,and in October 2020, the new variety was found to be stable andasexually reproduced true to type in successive generations.

The variety was developed and propagated in Iwate, Japan.

The variety can be propagated by cutting (optimal timing ismid-February) and/or tissue culturing via lateral bud culture.

Cultivation of the variety does not require particular conditions.Maintenance and storage method of the plant material can be by tissueculture via lateral bud culture.

The variety is adapted for use as cut flowers or pot flowers.

SUMMARY OF THE VARIETY

The variety is distinguished by double flower type and has a diameter atthe top of the corolla of 30.6 mm, as compared to ‘Shine Blue Ashiro’variety which is single flower type and has a diameter at the top of thecorolla of 25.0 mm. ‘Shine Blue Ashiro’ is unpatented.

A comparison with ‘Shine Blue Ashiro’ variety is presented as follows inTable 1:

TABLE 1 ‘Shine Blue Ashiro’ ‘Ashiro 29-2075’ Flower type Single doubleDiameter at top of corolla 25.0 mm 30.6 mm

Additional distinguishing characteristics of the ‘Ashiro 29-2075’ plantare the six-seven (6.6 on average) lobes of the paracorolla, and thestrong blue color (N95B on R.H.S. colour chart) of the secondary lobeswith acute apex in-between the main lobes of the corolla

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings, which are as nearly true as is reasonablepossible to make in a color illustration of this type:

FIG. 1 is a color photograph showing the ‘Ashiro 29-2075’ plant as grownin a culturing bed;

FIG. 2 is a color photograph showing flowers of the ‘Ashiro 29-2075’plant;

FIG. 3 is a color photograph showing flowering stages of flowers of the‘Ashiro 29-2075’ plant;

FIG. 4 is a color photograph showing petals of flowers of the ‘Ashiro29-2075’ plant;

FIG. 5 is another color photograph showing flowers of the ‘Ashiro29-2075’ plant;

FIG. 6 is a map showing the steps of the cross-breeding program fromwhich the variety was obtained.

Due to chemical and/or digital development, processing and printing, theplants or portions of plants depicted in the photographs may or may notbe precisely accurate, when compared to the actual botanical specimens.

DETAILED DESCRIPTION OF THE INVENTION

The plants in the botanical description below and shown in the Figureswere grown in Iwate, Japan. The plants were collected in October 2020 atage 16 months.

Colors are given according to The 2015 R.H.S. Colour Chart.

BOTANICAL DESCRIPTION

TABLE 2 Stem Length: 81.9 cm Stem shape in cross-section: circularThickness (main flowering 3.4 mm stem): Number of flowering stems 12.7per plant (average): Texture: smooth Color: strong yellow green (145A onRHS Colour Chart) Anthocyanin coloration at two present thirds frombase: Number of internodes longer 21.2 than 5 mm (average): Length ofinternode in central 4.3 cm third: Side shoots: present Number of sideshoots with 0.2 only one node (average): Number of side shoots with 8.9more than one node (average): Position of longest leaf: in lower thirdLeaf Length: 6.4 cm Leaf arrangement: opposite leaf arrangement Leafattachment: sessile Leaf apex: acuminate Leaf margin: entire Leaf base:rounded Leaf texture (inner side): smooth Leaf texture (outer side):smooth Leaf color (inner side): moderate olive green (137A on RHS ColourChart) Leaf color (outer side): moderate yellow green (138C on RHSColour Chart) Leaf venation pattern: parallel venation (three lines)Width: 2.2 cm Shape: broad lanceolate Shape in cross section: foldedupwards Shape in longitudinal straight section: Twisting: present Numberof conspicuous 3 veins: Anthocyanin coloration: absent InflorescenceDistribution of flowers: clustered Position of flowers: terminal andaxillary Plant: Number of terminal flowers 5.1 (average): Typical plantheight: about 81.9 cm (cut flower or potted plant) Typical growth habit:erect Plant spread (average): 69.6 cm Sequence of flowering: from topdownwards Number of flowers per top: 5.1 inflorescence: others: 2.0Sequence of flowering: from top downwards Number of flowers at central2.0 flowering node (average): Number of flowering node: 7.1 Flower budShape of bud: oval (about 4 days before flowering) Length of bud(average): 40.96 mm Diameter of bud (average): 13.36 mm Color of bud:dark purple (83A on RHS Colour Chart) Flower Type: double Time offlowering: late October Flower longevity (potted 17 days plant): Flowerlongevity (cut flower): 8 days Corolla Depth: 42.8 mm Diameter at middlethird: 17.8 mm Shape: campanulate Diameter at top: 30.6 mm Curvature oflobes: reflexed Color of inner side of lobes: moderate blue (N95C on RHSColour Chart) Tube length (average): 26.1 mm Color of upper part ofinner light purplish blue (N95D side of tube: on RHS Colour Chart) Colorof upper part of outer dark purple (83A on RHS side of tube: ColourChart) Streaked pattern on outer present side of tube: Color of streakedpattern on purplish-brown outer side of tube: Density of spots on theinner very sparse side of the corolla lobes: Density of spots on theupper sparse part of the inner side of the corolla tube: Density ofspots on the absent outer side of the corolla tube: Number of lobes: 6.6Length of lobes: 7.8 mm Width of lobes: 10.8 mm Shape of lobes: broadtriangular Shape of distal end of lobes: acute Presence of secondarylobes: present Average number of secondary 6.6 lobes per flower: Shapeof secondary lobe acute apex: Color of secondary lobes strong blue (N95Bon RHS Colour Chart) for both surfaces Paracorolla Presence ofparacorolla: present Number of paracorolla lobes 6.6 (average):Paracolla apex shape: acute Calyx Anthocyanin coloration: present Lengthof tube: 12.7 mm Diameter of tube: 6.9 mm Shape of tube: funnel-shapedShape of lobe: narrow lanceolate Sepal Sepal number: 6 Sepal lobe shape:narrow lanceolate Sepal apex: acute Sepal color (inner side): darkyellowish green (136B on the RHS Colour Chart) Sepal color (outer side):strong yellow green (143C on the RHS Colour Chart) Reproductive Stamensand anther: stamens are mutated into organs petals and there is noanther Time of flowering: late October Pistil number: 1 Pistil length(average): 32.3 mm Anther shape: narrow oval Anther color: light yellowgreen (145C on RHS Colour Chart)

In the above chart, specific numbers correspond to average values.

-   Other features of the plant are as follows:    -   -   Disease resistance.—Normal resistance was observed for pests            and diseases in Iwate, Japan, using pest control by chemical            spraying for gentian.        -   Cold hardiness.—Strong, the variety can withstand winter in            Iwate, Japan, including low temperatures of about −10° C.            with abundant snow.        -   Heat tolerance.—Normal, the variety can withstand summer in            Iwate, Japan, including high temperatures of about 35° C.        -   Flower fragrance.—Absent.

We claim:
 1. A new and distinct variety of Gentiana plant named ‘Ashiro 29-2075’, substantially as described and illustrated herein. 